The
of the line on a velocity vs. time graph represents acceleration.

Assuming the usual convention that velocity is represented along the up and down, or y, axis and time is represented along the right and left, or x, axis, the answer is pretty obvious. Here’s a hint: all the points on a horizontal line have the same up and down position, so whatever is represented by that position (see above) is staying the same.

Explanation:

If the vertical axis is velocity and the horizontal axis is time, it means that the velocity is not varying over time.There is no acceleration, but if the velocity value is non-zero, them the location is changing at a constant velocity. Hope this helps have a awesome day/night❤️✨

No because scientist are still changing there mines today so they are not correct to this day

Ohm's law tells you that i = v/r where v is equivalent voltage and r is equivalent resistance of the circuit
since all circuits have the same voltage, your question is really asking which circuit has the lowest total resistance, since the lower the resistance, the higher the current
circuit a has a resistance of 5 ohms; circuit c is in series so has a resistance of 10 ohms; circuit b is in parallel and therefore has a resistance of 2.5 ohms (review your notes on adding resistances in parallel and series); therefore b has the highest current